Gutmaxx



(No Model.)

L. GUTMANN.

ELECTRIC CONVERTER.

No. 397,910. Patented Feb. 19, 1889.

Fig/

An st MW W I UNITED STATES PATENT OFFICE.

LUDIVIG GUTMANN, OF NEW' YORK, N. Y.

ELECTRIC CONVERTER.

SPECIFICATION forming part of Letters Patent No. 397,910, dated February19, 1889.

Application filed April 26, 1888.

To all whom it may concern.-

Be it known that I, LUDWIG GUTMANN, a subject of the Queen of GreatBritain, and a resident of New York city, in the county and State of NewYork, have invented certain new and useful Improvements in ElectricConvertl ers, of which the following is a specification.

M y invention relates to the construction of an electric converter forchanging the electromotive force of currents.

The object of the invention is to simplify the device in such a manneras to reduce the cost of manufacture. i

In the construction of elect rie converters it i is usual to build upthe cores of iron plates or sheets. Each sheet contains one or more perforations, through which the coils pass. In order to get the coils inthe perforations it has been necessary to cut the plate from the outsideedge to the perforations in twoplaces. lly my invention the plate orsheet has but one i cut.

The invention is described by reference to the accompanyingdrawings.

Figure 1 is a view of one of the sheets, and Fig. 2 is an edge view ofseveral similar sheets I insulated from each other, as they would be inthe construction of a converter.

In both figures a portion of the coil is shown. The coil is representedas made of two different-sized wires, indicating, respectively, the

Serial No. 271,877. [No model.)

lar perforations or similar openings for holding the coil Z), which isformed of two independent conductors. A single cut, f, or opening ismade from one perforation to the other, so that the cross-piece c,separating the two perforations, may be bent awayat the dotted line (Zand the plate slid over the coil. Subsequently the said cross-piece,which is lettered c, is bent back again into its original position.

I claim as my invention- 1. An element for thecore of an electricconverter, consisting of an iron plate provided with two openings whichcontain the coil and with a cut or slit which connects the two openings.

An electric converter consisting of the combination of a coilsurroumlcdby an uncut iron plate perpendicular to the axes of theconductors forming the coil and an iron cross piece passing through thecenter of the coil and connected atone end to the said iron plate.

An element for an electric converter, consisting of a sheet of ironsuitably perforated 1 and provided with a single out between theperforations for the entrance of the converters coil.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 10th day of April, 1.888.

LUDWIG GUTBIAXY.

Witnesses:

EDWARD P. THOMPsON, HAL BELL.

